Addressing sustainability in the aluminum industry: A critical review of life cycle assessments

Gang Liu*, Daniel B. Müller

*Kontaktforfatter for dette arbejde

Publikation: Bidrag til tidsskriftReviewForskningpeer review

Resumé

This article discusses the state of the practice, strength, and weakness of life cycle assessments (LCA) for achieving sustainability goals in the aluminum industry. Notable features of the reviewed LCAs include a limited geographical and life cycle scope and differentiated system boundaries, a common practice to use industry-wide inventory data, a polarized debate on allocation of aluminum recycling, and a predominant focus on energy and greenhouse gas emissions environmental metrics. Not surprisingly, the various studies have produced significantly different results, e.g., the greenhouse gas emissions per kilogram primary aluminum production range from 5.92 to 41.10 kg CO2-equivalent and the “break-even point” (the point when the fuel economy benefits of the lighter aluminum vehicle offset added emissions from the production stage) of vehicles lightweighting ranges from 50,000 to 250,000 km. These variations relate not only to real world differences (e.g., temporal and geographical characteristics), but also partly to data uncertainties and methodological choices. Particularly, the recyclability, long lifetime, and environmental benefits in the use phase of aluminum pose great challenges for LCA methodology, especially for the allocation of recycling. The identified uncertainties and deficiencies can serve as an important base for further improvement of subsequent LCA applications in the aluminum industry.
OriginalsprogEngelsk
TidsskriftJournal of Cleaner Production
Vol/bind35
Sider (fra-til)108-117
ISSN0959-6526
DOI
StatusUdgivet - 2012
Udgivet eksterntJa

Fingeraftryk

Sustainable development
Life cycle
life cycle
aluminum
sustainability
Aluminum
Industry
greenhouse gas
recycling
geographical characteristics
Gas emissions
Greenhouse gases
Recycling
Fuel economy
methodology
aluminium industry
Sustainability
Life cycle assessment
industry
energy

Citer dette

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Addressing sustainability in the aluminum industry : A critical review of life cycle assessments. / Liu, Gang; Müller, Daniel B.

I: Journal of Cleaner Production, Bind 35, 2012, s. 108-117.

Publikation: Bidrag til tidsskriftReviewForskningpeer review

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